The Mech Ace Who Defied Orders

In a post-apocalyptic era where humanity relies on mechs to fight against alien beasts, Ethan—a former S-class mech commander of the military—lost his comrade Ron due to faulty intelligence. When the military refused to acknowledge the existence of a new type of "mimic beast," he resigned from the army in anger. Three years later, he hides his identity and joins the Vanguard Squad as an ordinary mech maintenance engineer. During a hundred-person escort mission, Ethan discovers a fatal malfunction in the A-class mech "Valkyrie," but is mocked by ace pilot Ava and the rest of the squad due to his lowly status. When the malfunction finally erupts and a B-class alien beast suddenly appears, the entire convoy is pushed to the brink of annihilation. At the critical moment, Ethan dons his armor and returns to battle, taking control of the crippled Valkyrie—and the maintenance worker once looked down upon begins to reveal his true S-class strength once more.